OpenAI's March 2026 $122 billion funding round at an $852 billion post-money valuation has anchored trader consensus that it ranks second among private companies, behind only SpaceX, with its scale of committed capital from major tech backers and rapid large language model revenue growth reinforcing this lead. With just two weeks left until the end of August, limited room remains for valuation swings or new rounds to alter the hierarchy. Anthropic's May 2026 $965 billion mark and other AI labs' progress represent the main variables that could narrow the gap, though current market-implied odds reflect limited near-term disruption risk given the short timeframe and established funding momentum.